What are some tips on finding Native American artifacts?

My dad has found lots of Indian artifacts. But he has mostly just stumbled upon these while going out hunting. I actually go out to look for them, and I havnt had any luck. I would think some of the best places to look would be along creeks and stuff like that, but I havn’t found anything yet, can anybody give me some advice to increase the likelyhood of me finding something? -not sure which category to put this under-
Whatever, I enjoy looking for Indian artifacts, as I have a lot of Native American ancestors. Whatever I find I keep, and will one day hand down to my children.
There is no way I’m going to spend hours looking for an Indian Artifact, then after finding one precious artifact, am going to send it to some western tribe when they weren’t even the ones whose ancestors did make the artifacts. If they hold them so sacred they should buy them, that way we would have at least a small reward for our work.